/* ===================================
   Terro AI - Component Styles
   =================================== */

/* ===================================
   Buttons
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: 1;
  text-decoration: none;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
.btn--primary {
  background: var(--gradient-primary);
  color: var(--color-text-primary);
  border-color: transparent;
}

.btn--primary:hover:not(:disabled) {
  box-shadow: var(--shadow-glow-primary);
  transform: translateY(-2px);
}

/* Secondary Button */
.btn--secondary {
  background: var(--color-secondary);
  color: var(--color-text-primary);
}

.btn--secondary:hover:not(:disabled) {
  background: var(--color-secondary-dark);
  box-shadow: var(--shadow-glow-secondary);
  transform: translateY(-2px);
}

/* Outline Button */
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover:not(:disabled) {
  background: var(--color-primary);
  color: var(--color-bg-dark);
}

/* Ghost Button */
.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn--ghost:hover:not(:disabled) {
  background: var(--color-bg-light);
  color: var(--color-text-primary);
}

/* Button Sizes */
.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* Button with Icon */
.btn svg {
  width: 1.25em;
  height: 1.25em;
}

/* ===================================
   Cards
   =================================== */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-light);
  box-shadow: var(--shadow-lg);
}

/* Glassmorphism Card */
.card--glass {
  background: rgba(30, 30, 45, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.card--glass:hover {
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
}

/* Feature Card */
.feature-card {
  text-align: center;
  padding: var(--space-8);
}

.feature-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-6);
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  font-size: var(--text-2xl);
}

.feature-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.feature-card__description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* Team Card */
.team-card {
  text-align: center;
  padding: var(--space-6);
}

.team-card__image {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  overflow: hidden;
}

.team-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-card__name {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.team-card__role {
  font-size: var(--text-sm);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.team-card__bio {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* Use Case Card */
.use-case-card {
  padding: var(--space-6);
}

.use-case-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  cursor: pointer;
}

.use-case-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-bg-light);
  border-radius: var(--radius-lg);
  font-size: var(--text-xl);
  flex-shrink: 0;
}

.use-case-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  flex: 1;
}

.use-case-card__toggle {
  color: var(--color-text-secondary);
  transition: transform var(--transition-base);
}

.use-case-card.open .use-case-card__toggle {
  transform: rotate(180deg);
}

.use-case-card__overview {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
}

.use-case-card__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.use-case-card.open .use-case-card__content {
  max-height: 1000px;
}

.use-case-card__detail {
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  background: var(--color-bg-light);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-primary);
}

.use-case-card__detail--challenge {
  border-left-color: var(--color-accent);
}

.use-case-card__detail--solution {
  border-left-color: var(--color-primary);
}

.use-case-card__detail--results {
  border-left-color: var(--color-success);
}

.use-case-card__detail-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.use-case-card__detail-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ===================================
   Form Elements
   =================================== */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2);
}

.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: var(--color-error);
}

.form-input.success,
.form-textarea.success {
  border-color: var(--color-success);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23A0A0B0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 18px;
  padding-right: var(--space-10);
}

.form-error {
  font-size: var(--text-sm);
  color: var(--color-error);
  margin-top: var(--space-2);
}

.form-success-message {
  text-align: center;
  padding: var(--space-8);
  background: var(--color-bg-light);
  border-radius: var(--radius-xl);
}

.form-success-message__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: var(--color-success);
  border-radius: var(--radius-full);
  color: white;
  font-size: var(--text-2xl);
}

.form-success-message__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.form-success-message__text {
  color: var(--color-text-secondary);
}

/* ===================================
   Accordion
   =================================== */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.accordion__item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.accordion__header:hover {
  background: var(--color-bg-light);
}

.accordion__icon {
  color: var(--color-text-secondary);
  transition: transform var(--transition-base);
}

.accordion__item.open .accordion__icon {
  transform: rotate(180deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.accordion__item.open .accordion__content {
  max-height: 500px;
}

.accordion__body {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ===================================
   Stats
   =================================== */
.stat {
  text-align: center;
}

.stat__value {
  font-size: var(--text-4xl);
  font-weight: var(--font-black);
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat__value--gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===================================
   CTA Banner
   =================================== */
.cta-banner {
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.cta-banner__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.cta-banner__text {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-6);
  max-width: 600px;
  margin-inline: auto;
}

.cta-banner .btn {
  background: var(--color-bg-dark);
  color: var(--color-text-primary);
}

.cta-banner .btn:hover {
  background: var(--color-bg-medium);
}

@media (min-width: 768px) {
  .cta-banner {
    padding: var(--space-16) var(--space-8);
  }

  .cta-banner__title {
    font-size: var(--text-3xl);
  }
}

/* ===================================
   Animation Classes
   =================================== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animations */
.animate-on-scroll[data-delay="1"] { transition-delay: 100ms; }
.animate-on-scroll[data-delay="2"] { transition-delay: 200ms; }
.animate-on-scroll[data-delay="3"] { transition-delay: 300ms; }
.animate-on-scroll[data-delay="4"] { transition-delay: 400ms; }
.animate-on-scroll[data-delay="5"] { transition-delay: 500ms; }

/* Keyframe Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-fade-in { animation: fadeIn 0.6s ease-out forwards; }
.animate-slide-up { animation: slideUp 0.6s ease-out forwards; }
.animate-scale-in { animation: scaleIn 0.6s ease-out forwards; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-float { animation: float 3s ease-in-out infinite; }